feat: add videodb media index with Docker stack

- Add videodb PHP/MySQL media collection manager (Blu-ray, DVD, CD)
- Dockerfile: PHP 8.1 + Apache with GD/mysqli/exif extensions
- docker-compose.yml: app on port 6761 + MySQL 8.0 with health checks
- docker-entrypoint.sh: auto-generates config.inc.php from env vars,
  waits for MySQL, initializes DB schema idempotently
- init-db.php: CLI schema installer using app's own prefix_query() logic
- Persistent volumes for DB, cache, and cover images

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

videodb/templates/elegant/permissions.tpl

@@ -0,0 +1,66 @@
+{*
+  Template for the permission management screen
+  $Id: permissions.tpl,v 1.4 2005/05/30 11:52:50 andig2 Exp $
+*}
+
+<!-- {$smarty.template} -->
+
+{if $message}
+<div id="actions">
+    <br/>
+    <div class="center">
+        {$message}
+    </div>
+</div>
+<!-- /actions -->
+{else}
+    <div id="topspacer2"></div>
+{/if}
+
+<div id="content">
+
+<div id="permissions">
+
+<form action="permissions.php" method="post">
+
+<table width="100%">
+    <tr>
+        <td colspan="3" class="left">
+            <h3>{$lang.permforuser} {html_options name=from_uid options=$owners selected=$from_uid onchange="submit()"}:</h3>
+        </td>
+    </tr>
+
+    <tr class="{cycle values="even,odd"}">
+        <th>{$lang.username}</th>
+        <th>{$lang.read}</th>
+        <th>{$lang.write}</th>
+    </tr>
+
+    {foreach item=perm from=$permlist}
+    <input type="hidden" name="newflag_{$perm.to_uid}" id="newflag_{$perm.to_uid}" value="{$perm.newentry}" />
+    <tr class="{cycle values="even,odd"}">
+        <td class="center">
+            {$perm.to_name}
+        </td>
+        <td class="center">
+            <input type="checkbox" name="readflag_{$perm.to_uid}" id="readflag_{$perm.to_uid}" value="1" {if $perm.read}checked="checked"{/if}/>
+        </td>
+        <td class="center">
+            <input type="checkbox" name="writeflag_{$perm.to_uid}" id="writeflag_{$perm.to_uid}" value="1" {if $perm.write}checked="checked"{/if}/>
+        </td>
+    </tr>
+    {/foreach}
+</table>
+
+<div id="permissionbuttons">
+    <input type="button" value="{$lang.back}" class="button" onclick="window.location.href='users.php';" accesskey="c" />
+    <input type="submit" name="save" value="{$lang.save}" class="button" accesskey="s" />
+</div>
+
+</form>
+
+</div>
+<!-- /permissions -->
+
+</div>
+<!-- /content -->